Hello,
I need host permissions for each of the translator services my addon supports, so theoretically, I could replace with a list of 7+ domains, one of each translation page.
However, some translators are using also other domains, for example google translate also loads data from "gstatic.com". Plus if they ever change it in the future, I would have to ask for a new host permission, which would force each user to approve the new permission!

So using permission for all pages solved this issue, even though for a cost of big and dangerous permission :(.
Note that originally, this addon was developed only for Thunderbird, where permission to "access to all pages" is not as big issue since people don't open pages there :).

In any case, as with all of my many addon, I'm doing my best to protect users data and privacy: https://github.com/fastaddons/privacy_policy

I hope this helps :)
Have a nice weekend!

Best Regards,
Juraj Mäsiar

Hello,
Thank you for reporting this!
It seems that Bing whole page translation is broken.
But you can change it to use "Google translate" instead which still works - in the Settings / Translate page.

The addon is indeed mainly meant to be used to translate selected text.
Best Regards,
Juraj Mäsiar

Hello,
Did you changed the default language in the settings?
Also what translator provider did you used?
I should be able to fix it if I can reproduce it.

Best regards,
Juraj Mäsiar